River Twiss

River Twiss
River Twiss and Ingleton Viaduct
Location
Country	England
Physical characteristics
Source
• location	Kingsdale Beck, Keld Head
• coordinates	54°11′3″N 2°28′4″W / 54.18417°N 2.46778°W / 54.18417; -2.46778 (Source of River Twiss)
• elevation	264 metres (866 ft)
Mouth
• location	River Doe
• coordinates	54°9′11″N 2°28′15″W / 54.15306°N 2.47083°W / 54.15306; -2.47083 (Mouth of River Twiss)
• elevation	118 metres (387 ft)
Length	4.17 kilometres (2.59 mi)

The River Twiss is a river in the county of Yorkshire, England. The source of the river is Kingsdale Beck, which rises at Kingsdale Head at the confluence of Back Gill and Long Gill in the Yorkshire Dales. Beneath Keld Head, the river changes its name to the River Twiss. It has two notable waterfalls, Thornton Force and Pecca Falls, and its course follows part of the Ingleton Waterfalls Walk,^[1] then through Swilla Glen to Thornton in Lonsdale and down to Ingleton, where it meets the River Doe to form the River Greta.

The English landscape artist J. M. W. Turner was a frequent visitor to the area, and his sketch of Thornton Force in 1816 is currently part of the Tate collection.^[2]